Improvement in hoisting-apparatus



@wat mijn.

HENRY D. STOVER, OF NEW YORK, N. Y.

'Leners Pumt No. 91,288, dated June 15, 1869; madam .rime 2, 1869.

IMPROVEMENT IN HOISTINGAPPARATUS.

The Schedule referred. to in thele Letten Patent and making parl: of the name.

Know all men by these'presents.:

That I, HENRY D. STOVER, of the city, county, and State of New York, have invented a new and useful Improvement in Hoisting-Apparatus, whereby great convenience and safety are secured in lifting pieces of work to and from machines when the same are being constructed; and I do hereby declare the following to be a clear and exact description of the invention, reference being had to the accompanying drawings, and letters of reference thereon, so that any skilled in such Y matters can construct and use' the same.

Figure 1 represent-s my device as attached to a machine for boring out the centres of car-wheels.

Figure 2 is a view as seen in looking down upon the machine.

Figure 3 is au elevation at right angles to fig. 1.

Figure 4 is a view of the lifting-arm and nut.

Like letters refer to like parts in all the views.

Before any further description, I would here remark that I have merely chosen the boring-mill to illustrate one of the simplest methods of attaching my invention to a tool where weights are to be frequently changed; but I deem the invention as applicable to any other machine where hoisting-apparatus is required.

As will be readily seen from the drawings, my invention consists of a veitical screw, of sufficient length to reach between the two extremes, through which the weights are to be moved, and placed in such proximity to thel machines from and to which the weights are to be moved, as that the lifting-arm, which may be of any desired length to swing the work from the machine, can easily reach over the centre of the maf chine, and, in lifting the work, may also swing clear of the machine, whenever desired.

A, iigs. 1 and 3, represents the /vertical screw,` its lower end working in a step in the bed-plate of the boring-mill B, and its upper end supported by a bracket connected with the frame, as at C, figs. 1 and 3.

Upon this screw, a nut, having one side prolonged to form a lifting-arm, as at D, travels, by the rotation of the screw, or by hand, as shown in the drawings, where a hand-wheel, E, is represented at the upper end of the screw; or it may he done by any other .suitable mechanism, either by gearing or belting, as

desired.

This nut D, to serve as a lifting-device, requires to be of considerable depth, that is, more than is necessary to give the requisite strength of thread-screw. It may be made in two or more parts, as a forked bracket, having the nut formed through the end of the forks, as shown at iig. 4. In this manner, any desired width of base for such a bracket may be had, without making the arm unwieldy or unnecessarily heavy.

At the outer extremity of this nut, suitable hooks or eyes, as at I, figs. 1 and 3, for attaching the liftinglinks F, or chains, may be provided.

I am aware of the patent of William Maher, December 23, 1856, for hoisting-apparatus. This I do not claim but, having described myy invention,

What I claim as new, and desire to secure by Let ters Patent of the United States, is-

Ih'e combination, with a boring-machine, B, or other machine having a restfbed for heavy bodies, of the vertical screw A, hand-wheel E, and lifting and swinging nut D, when constructed, arranged, and operated substantially in the manner as shown and described, and for the purpose set forth.

H. D. STOVER.

Witnesses:

A. MOORE, EL S. MILLER. 

